JPH07217719A - Automatic transmission for vehicle - Google Patents

Abstract

PURPOSE:To avoid waste of energy and to lessen speed-change operating force at the time of stopping a vehicle by automatically cutting off a driving source, to prevent sudden starting of the vehicle at the time of running the vehicle by automatically starting the driving source while a speed-change ring is at a position corresponding to 0(zero) of a rotational speed of an output shaft. CONSTITUTION:A motor is used as a driving source 9 of an input shaft 3. A speed-change gear system, ranging from a movable spring bracket 28 to a fixed spring shoe 25, at a reference position corresponding to 0(zero) of a rotational speed of an output shaft 4 is provided with gap DELTAS that produces a time lag in speed change operation. A detector 34, which detects the movable spring bracket 28, displaced from the reference position onto a roller's head side, during the time lag in the speed change operation in order to output a first signal and which detects the movable spring bracket 28, which moved onto the roller's bottom side or up to the reference position, in order to output a second signal, and a driving controller 35, which starts the driving source 9 based on the first signal and which cuts off the source 9 based on the second signal, are prepared.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic transmission for a vehicle, which is preferably used for a vehicle, particularly a medium-sized special vehicle, a work vehicle, a carrier vehicle and the like.

[0002]

2. Description of the Related Art As an automatic transmission for a vehicle, Japanese Patent Laid-Open No.
JP-A-125854 discloses that a transmission system from an input shaft to an output shaft is provided with a small-diameter transmission wheel, a large-diameter transmission wheel, and a speed-change ring on the same axis as them, and a plurality of conical rotors can be planetarily moved on them. Is frictionally engaged with the speed change ring by axially displacing the speed change ring along the conical surface of the conical trochanter to the trochanter top side and trochanter bottom side, and the output shaft rotation speed is within the speed change range. A friction continuously variable transmission of the type including 0 is provided with a cam device that generates thrust in accordance with the torque applied to the speed change ring, and the control of the internal combustion engine by the accelerator pedal and the detection of the load torque by the cam device are associated with each other. In this automatic shift, a spring seat is provided on the rod that moves in the center line direction by an amount corresponding to the amount of depression of the accelerator pedal, and the spring seat is provided between the spring seat and the speed change ring support. That is interposed a spring for receiving the thrust of beam apparatus is disclosed.

In the automatic transmission having the above structure, the transmission ring is urged to the trochanter top side, that is, to the high speed side through the spring by the depression of the acceleration pedal, and at the same time, the thrust force of the cam device corresponding to the load torque on the output shaft. Is urged to the bottom side of the trochanter, that is, to the low speed side, and the gear ratio according to the load torque is determined under the balance between the repulsive force of the spring and the thrust of the cam device.

[0004]

However, according to the above-mentioned prior art, since the internal combustion engine is used as the drive source, the drive source is stopped even at the time when the rotational speed of the output shaft is 0 when the vehicle is temporarily stopped or during a short rest. Therefore, when an electric motor that can be easily started and stopped is adopted as the drive source instead of the internal combustion engine in the above configuration, energy is not consumed in the mechanism in which the drive source continues to rotate even when the rotational speed of the output shaft is 0. When the vehicle is started, the drive source may be started when the speed change ring is not displaced to the position corresponding to the rotation speed 0 of the output shaft when the vehicle starts, and there is a risk of sudden start of the vehicle or an overcurrent. Problems such as over-discharging of the drive source battery will occur, and the gear shifting operation force will increase, making mechanical operation difficult, especially when the gear shifting operation is performed remotely in medium-sized vehicles. Problems such as theft.

An object of the present invention is to automatically stop the drive source when the vehicle is stopped to save energy and reduce the speed change operation force, and moreover, when the vehicle is started, the speed change ring brings the output shaft to zero rotation speed. An object of the present invention is to provide an automatic transmission device for a vehicle that automatically starts a drive source while being in a corresponding position to prevent a sudden start of the vehicle.

[0006]

In a vehicle automatic transmission according to the present invention, a small-diameter transmission wheel, a large-diameter transmission wheel, and a transmission ring are arranged on the same axis as the transmission system from the input shaft to the output shaft. And a plurality of conical rotors are frictionally engaged with them so as to be able to perform a planetary movement, and the transmission ring is axially displaced along the conical surface of the conical rotor toward the top side and the bottom side of the rotor. The friction continuously variable transmission for driving the vehicle of the type in which the gear shift is performed by the gear shift range and the output shaft rotational speed is 0, and the thrust for urging the gear shift ring to the trochanter bottom side according to the load torque at the output shaft. A cam device that generates the, a support shaft that is provided so as to be interlockable with the transmission ring in the axial direction,
The fixed spring bearing provided on the support shaft and the movable spring bearing provided so as to be displaceable in the axial direction, and the fixed spring bearing and the movable spring bearing are interposed between the fixed spring bearing and the movable spring bearing along the support shaft to increase the thrust of the cam device. The spring that generates repulsive force that urges the speed change ring to the trochanter top side, and the movable spring receiver, the spring, and the fixed spring receiver in this order, are used to sequentially displace the support shaft to the trochanter top side and decelerate. Sometimes a shift operating device for displacing the support shaft to the trochanter bottom side is used, in which an electric motor is used as a drive source for the input shaft, and a movable spring receiver to a fixed spring receiver at a reference position corresponding to a rotational speed 0 of the output shaft. A gap is created in the speed change transmission system to cause a time delay in the speed change operation, and the movable spring bearing displaced from the reference position to the top of the trochanter is detected during the time delay in the speed change operation to detect the first signal. And output the trochanter Detector that outputs a second signal by detecting the movable spring bearing that has been displaced to the reference position on the part side, and the drive source is started based on the first signal of the detector and the second signal of the detector It is characterized in that a drive control device that stops based on the above is provided.

In the above structure, the detector may be separately provided for the one that outputs the first signal and the one that outputs the second signal. Further, the gear shift operating device may directly drive the movable spring bearing or the support shaft with a handle, a pedal, or the like, or the gear shifting operating device is composed of a pilot motor, and the rack is mounted on the support shaft as the movable spring bearing. A pinion, which is provided so as to be displaceable in the axial direction and is rotationally driven by a pilot motor, meshes with the rack,
Further, a fixed rack receiver may be provided on the support shaft on the trochanter bottom side of the rack so as to be able to contact the rack.

In the above structure, a position detector that outputs a signal corresponding to the position of the speed change ring, a position setter that outputs a signal according to the target position of the speed change ring, and a signal and position setting of the position detector. There may be provided a comparator for comparing the signal of the gearbox with the same physical quantity reference, and an operation control device for automatically operating the shift operation device based on the deviation in the comparator.

As the position detector, other than the one for detecting the positions of the speed change ring, the support shaft, and the like, a device for detecting the position of the movable spring receiver in interlocking relation therewith may be adopted. When a pilot motor is used for the speed change operation device, a position detector that suitably detects, for example, the rotation angle of the pinion to detect the position of the rack and outputs a signal corresponding to the position of the speed change ring is preferably adopted. be able to. Further, as the position setter, for example, an accelerator device that outputs a voltage corresponding to a rotation angle of a pedal, a grip, a lever, a handle, or the like according to a target position of a transmission ring can be adopted.

Further, in the above construction, a speed detector for outputting a signal according to the speed of the vehicle, a speed setter for outputting a signal according to the target speed of the vehicle, a signal of the speed detector and a speed setter. It is also possible to provide a comparator that compares the signal with the same physical quantity reference, and an operation control device that automatically actuates the shift operation device based on the deviation in the comparator. As the speed detector, for example, a tachometer that measures the number of rotations of the output shaft or the axle may be adopted.

[0011]

When the movable spring receiver is displaced along the support shaft from the reference position corresponding to the rotational speed 0 of the output shaft to the top of the trochanter by the gear shift operation device, the time required for the gear shift operation based on the gap on the gear transmission system. The actual shift operation is started after a delay, and the movable spring receiver displaced from the reference position is detected by the detector during the time delay of the shift operation, and the drive source is detected based on the first signal of the detector. It is activated by the drive control device. Therefore, the drive source is automatically activated before the actual shift operation is started, that is, while the shift ring is at the position corresponding to the rotational speed 0 of the output shaft.

In the speed change operation by the speed change operation device, the displacement of the movable spring receiver is transmitted to the support shaft via the spring and the fixed spring receiver sequentially after the time delay of the speed change operation, and the support shaft is on the trochanter top side. The gearbox ring is displaced toward the high speed side in conjunction with this, and the vehicle gradually starts to start running and the speed is increased. When decelerating the vehicle, if the support shaft is displaced to the trochanter bottom side directly by the gear shift operation device or through a fixed spring bearing or other member, the gear shift ring is displaced to the low speed side in conjunction with this, and the vehicle is Be slowed down.

On the other hand, the cam device generates thrust in response to the load torque on the output shaft, and the speed change ring adjusted to the required position by the speed change operation device as described above resists the repulsive force of the spring together with the support shaft. It is displaced to the bottom of the trochanter, that is, to the low speed side, to a position in equilibrium with it, so that the vehicle runs at a gear ratio that is automatically decelerated from the required gear ratio in response to an increase in load torque due to changes in running conditions. to continue.

When the vehicle is stopped, the deceleration operation is continued to gradually displace the support shaft toward the trochanter bottom side, and the movable spring bearing displaced to the reference position is detected by the detector and the second spring of the detector is detected. The drive source is stopped by the drive controller based on the signal. Therefore, the drive source is automatically stopped when the shift ring is displaced to a position corresponding to the rotational speed 0 of the output shaft.

In the above-mentioned structure, when the gear shift operation device is composed of a pilot motor, when the pilot motor is activated to the speed-increasing side by the switch, the rack as the movable spring support is supported from the reference position to the rotator top side via the pinion. The vehicle is displaced along the axis, and the vehicle speed is increased after the time delay of the speed change operation as described above. When the pilot motor is stopped during acceleration, the displacements of the rack, the support shaft, and the speed change ring also stop, and the vehicle continues to travel at a speed change ratio corresponding to the position of the speed change ring at that time. Also, when the pilot motor is activated to the deceleration side by the switch while the vehicle is running at a constant speed, the rack is displaced along the support shaft to the trochanter bottom side, and the fixed rack receiver is moved to the same side as the support shaft by the rack. It is pressed, and the gear shift ring is displaced to the low speed side in conjunction with this.

Further, in the above-mentioned structure in which the gear shift operating device is operated by the position setter, when the target position of the gearshift ring is set by the position setter, the signal of the position detector and the signal of the position setter are compared. The shift operating device is automatically operated based on the deviation in the comparator, and the shift ring is displaced to the high speed side or the low speed side,
At the time when the deviation is 0, the gear shift operating device is stopped. If the position setter is provided with an automatic return function that automatically returns when it is not operated, the automatic return function operates when the driver leaves the vehicle, and a deviation for deceleration occurs in the comparator. , As described above, the drive source is automatically stopped when the support shaft is displaced together with the speed change ring to the trochanter bottom side, that is, the low speed side, and the speed change ring is displaced to a position corresponding to the rotational speed 0 of the output shaft. Will be done. When the position detector that detects the position of the movable spring receiver is adopted, the displacement of the speed change ring due to the fluctuation of the load torque is not detected, so that stable control that is not affected by the load torque can be obtained.

Further, in the above-mentioned structure in which the speed change device is operated by the speed setting device, when the target speed of the vehicle is set by the speed setting device, the signal of the speed detector and the signal of the speed setting device are operated by the comparator. It is compared, the shift operating device is automatically operated based on the deviation in the comparator, the shift ring is displaced to the high speed side or the low speed side, and the shift operating device is stopped when the deviation is zero. With this configuration,
When the shift ring is displaced to the low speed side due to the increase of the load torque, the vehicle is decelerated and the comparator is deviated.Therefore, the shift operation device is automatically operated to maintain the vehicle speed at the target speed. As a result, the shift ring is displaced to the high speed side. Further, the traveling distance of the vehicle can be measured by integrating the signals of the speed detector. The target speed of the vehicle at the speed setter may change according to a particular program. In addition, when the vehicle comes into contact with an obstacle while traveling, it is possible to operate the drive control device based on an abnormal deviation generated in the comparator and to make an emergency stop of the vehicle. The configuration using the speed setting device can be suitably used for, for example, an automated guided vehicle.

[0018]

EXAMPLES The present invention will be described below based on examples.

[First Embodiment] FIG. 1 is a longitudinal sectional view of an automatic transmission for a vehicle according to a first embodiment of the present invention, and FIG.
FIG. 3 is a plan view of the main part of the cam device shown in FIG. 3, and FIG. 3 is a side view of the main part for explaining the displacement state of the movable spring receiver shown in FIG.
Shows the states before the displacement, (B) shows the states immediately after the displacement starts, and (C) shows the states at the start of the shift operation after the displacement starts.

In FIG. 1, a friction continuously variable transmission 1 has a case 2 in which an input shaft 3 and an output shaft 4 are supported on the same axis.
Small diameter transmission wheel 5 on the input shaft 3 and large diameter transmission wheel 6 on the output shaft 4.
And a transmission ring 7 is arranged around them, and a plurality of conical rotors 8 are frictionally engaged with the small diameter transmission wheel 5, the large diameter transmission wheel 6 and the transmission ring 7 so as to be capable of planetary movement. The input shaft 3 is rotationally driven by a drive source 9 including an electric motor. In the friction continuously variable transmission 1, the speed change range includes the rotational speed 0 of the output shaft 4, and the speed change is performed by displacing the speed change ring 7 in the axial direction along the conical surface of the conical rotor 8. Acceleration occurs when the displacement is toward the trochanter top (left side in the drawing), and deceleration occurs when the displacement is toward the trochanter bottom side (right direction in the drawing).

The friction continuously variable transmission 1 is provided with a cam device 11 for generating a thrust force for urging the speed change ring 7 toward the trochanter bottom side in accordance with the load torque on the output shaft 4. The cam device 11 includes: As shown in an enlarged manner in FIG. 2, a lateral V-shaped cam acting surface 12 formed on the transmission ring 7 so as to taper to the trochanter bottom side, and the cam acting surface 12 can be engaged with the case 2. And a roller 13 supported by the roller 13. In this mechanism, the rotational force applied to the transmission ring 7 according to the load torque on the output shaft 4 is converted into thrust on the trochanter bottom side, that is, on the low speed side.

The speed change ring 7 is provided with a ring holding member 22 for holding both sides via a thrust receiver 21 arranged on the trochanter bottom side, and a support shaft 23 is axially pinned on the ring holding member 22. It is fixed at 24. In this mechanism, when the support shaft 23 is displaced in the axial direction, the transmission ring 7 is displaced in the same direction in conjunction with this, and the transmission ring 7 outputs when the ring holding member 22 contacts the inner wall of the case 2. It is adjusted so as to be in a position corresponding to a rotational speed of 0 of the shaft 4.

A fixed spring bearing 25 is fixedly mounted on the support shaft 23, a compression coil spring 26 is mounted adjacent to the fixed spring bearing 25, and a deceleration drive member 27 and a movable spring bearing 28 connected thereto are sandwiched therebetween. It is arranged so as to be integrally movable in the axial direction. Further, a handle 31 as a gear shift operating device is swingably supported on the case 2 via a pin 32 on the trochanter top side and the trochanter bottom side, and a movable spring receiver 28 and a deceleration drive member 27 are provided on the upper part thereof. It is pivotally attached via a connecting portion and a pin 33. In this mechanism, when the handle 31 is swung to the trochanter top side, the movable spring receiver 28 presses the fixed spring receiver 25 to the trochanter top side via the compression coil spring 26, and the support shaft 23 moves to the speed change ring 7. When the handle 31 is integrally displaced to the same side and the handle 31 is swung from the trochanter top side to the trochanter bottom side, the deceleration drive member 27 presses the fixed spring receiver 25 to the trochanter bottom side and the support shaft 2
3 is displaced integrally with the transmission ring 7 to the same side.

When the speed change ring 7 is in the position corresponding to the rotational speed 0 of the output shaft 4, the handle 31 is in the position where the swing angle is 0, and at that time, the deceleration drive member 27 contacts the fixed spring receiver 25. At the same time, the compression coil spring 26 and the movable spring receiver 28 are provided with a gap ΔS that causes a delay in the speed change operation. The position of the movable spring bearing 28 corresponding to the rotational speed 0 of the output shaft 4 is set as a reference position, and a detector 34 for detecting the movable spring bearing 28 is arranged at the reference position.

In the above mechanism, as shown in FIG. 3 (A), the movable spring receiver 28 is at the reference position and the compression coil spring 2
In the state where a gap ΔS is formed between the handle 3 and the handle 3,
When 1 is swung from the position where the swing angle is 0 to the trochanter apex side, when the movable spring receiver 28 displaced from the reference position is detected by the detector 34 as shown in FIG.
The drive source 9 is started by the drive control device 35 based on the first signal of the above, and as shown in FIG. 3C, the movable spring receiver 28 is compressed by the movable spring receiver 28 after a time delay of the gear shift operation based on the gap ΔS. And the support shaft 23 is displaced integrally with the transmission ring 7 toward the trochanter top. When the handle 31 is swung toward the trochanter bottom side to the position of the swing angle 0, the speed change ring 7 returns to the position corresponding to the rotational speed 0 of the output shaft 4, and the movable spring receiver 28 displaced to the reference position. Is detected by the detector 34, the drive source 9 is stopped by the drive controller 35 based on the second signal of the detector 34.

In the above structure, the transmission ring 7 adjusted to the required position by the operation of the handle 31 is in a position where it is balanced against the repulsive force of the compression coil spring 26 by the thrust of the cam device 11 in accordance with the load torque. Is displaced to the bottom side of the trochanter, that is, to the low speed side together with the support shaft 23. Therefore, the gear ratio according to the load torque is determined under the balance between the repulsive force of the compression coil spring 26 and the thrust of the cam device 11. .

[Second Embodiment] FIG. 4 is a vertical sectional view of an automatic transmission for a vehicle according to a second embodiment of the present invention, and FIG.
FIG. 6 is a side sectional view of the main part of the movable spring receiver shown in FIG. 6, and FIG. 6 is an explanatory view showing the operating states of the respective members shown in FIG. 4 in comparison.

In the figure, a fixed spring receiver 25 and a compression coil spring 26 are arranged on the support shaft 23, and a fixed rack receiver 36 is provided at the outer end thereof.
A rack 28a as a movable spring receiver is arranged between the fixed rack receiver 36 and the fixed rack receiver 36 so as to be movable on the support shaft 23 in the axial direction. Further, the case 2 is provided with a pilot motor 41 as a gear shift operation device.
The pinion 42, which is rotationally driven by, is meshed with the rack 28a. In addition, the speed change ring 7 causes the rotation speed of the output shaft 4 to be zero.
, The pinion 42 is at the position where the rotation angle is 0, at which point the rack 28a is brought into contact with the fixed rack receiver 36 and the compression coil spring 26 and the rack 2 are engaged.
8a is provided with a gap ΔS that causes a time delay in the gear shifting operation, and a detector 34 is arranged at the reference position of the rack 28a as a movable spring receiver. Since the other configurations are the same as those in the first embodiment, detailed description will be omitted.

In the above structure, the pilot motor 41
When the pinion 42 is rotated toward the speed increasing side, the rack 28a is rotated from the reference position to the side of the trochanter apex at the same time when the pinion 42 is rotated.
And the drive source 9 is activated based on the first signal from the detector 34 in the same manner as in the first embodiment, and the support shaft 23 is moved to the transmission ring 7 after a time delay in the speed change operation. It is displaced together with the trochanter to the top side. FIG. 6 is a diagram showing the above situation, in which the rack 28a and the support shaft 23 (or the transmission ring 7) with respect to the rotation angle of the pinion 42 are shown.
The respective displacement amounts and the stop and start conditions of the drive source 9 are shown.

When the pilot motor 41 is stopped during speed increase, the rack 28a, the support shaft 23, and the speed change ring 7 are stopped.
Is also stopped, and the gear ratio corresponding to the position of the transmission ring 7 at that time is maintained. Further, when the pilot motor 41 is started to the deceleration side during constant speed rotation, the rack 28a
Is displaced along the support shaft 23 toward the trochanter bottom side, and the fixed rack receiver 36 is pressed by the rack 28a toward the same side integrally with the support shaft 23, and in conjunction with this, the transmission ring 7 is also displaced toward the low speed side. . When the rack 28a is displaced to the reference position, the drive source 9 is automatically stopped as described above.

[Third Embodiment] FIG. 7 is a vertical sectional view of an automatic transmission for a vehicle according to a third embodiment of the present invention. In the figure, a position detector 51 including a potentiometer that measures the rotation angle of the pinion 42 to detect the position of the rack 28a serving as a movable spring receiver and outputs a signal corresponding to the position of the transmission ring 7, and a pedal or the like. A position setter 52 including an accelerator device that outputs a signal corresponding to the target position of the transmission ring 7 by rotation, a comparator 53 that compares the signal of the position detector 51 and the signal of the position setter 52, and a comparator 53. And an operation control device 54 for automatically operating the pilot motor 41 as a gear shift operation device based on the deviation in (1). The rest of the configuration including the control mechanism of the drive source 9 is the same as that of the second embodiment, so a detailed description is omitted.

In the above structure, when the position setter 52 gives a signal corresponding to the target position of the speed change ring 7, the pilot motor 41 is operated based on the deviation in the comparator 53, and the speed change ring 7 is moved to the high speed side or the low speed side. When the deviation is 0, the pilot motor 41 is stopped. The position detector 51 can also be used as a detector that outputs the first signal and the second signal for controlling the drive source 9.

[Fourth Embodiment] FIG. 8 is a vertical sectional view of an automatic transmission for a vehicle according to a fourth embodiment of the present invention. In the figure, a speed detector 61 composed of a tachometer for measuring the number of rotations of the output shaft 4 and outputting a signal according to the speed of the vehicle,
Speed setter 62 that outputs a signal according to the target speed of the vehicle
And a comparator 63 for comparing the signal of the speed detector 61 with the signal of the speed setter 62, and the operation control device 54 for automatically operating the pilot motor 41 as the gear shift operation device based on the deviation in the comparator 63. And are provided. The rest of the configuration including the control mechanism of the drive source 9 is the same as that of the second embodiment, so a detailed description is omitted.

In the above structure, when the speed setter 62 gives a signal according to the target speed of the vehicle, the pilot motor 41 is operated based on the deviation in the comparator 63 and the transmission ring 7 is moved to the high speed side or the low speed side. Displacement and deviation 0
At that time, the pilot motor 41 is stopped.

[0035]

Since the automatic transmission for a vehicle according to the present invention is constructed as described above, when the vehicle is stopped, the drive source is automatically stopped to save energy and reduce the shift operation force. Moreover, when the vehicle starts moving, the drive source can be automatically started while the speed change ring is at the position corresponding to the rotational speed 0 of the output shaft to prevent sudden starting of the vehicle.

In the above-mentioned structure, when the gear shift operating device comprises the pilot motor, the gear shift ring can be easily displaced to the required position by the operation of starting and stopping the pilot motor.

Further, in the above structure, in the case where the gear shift operating device is actuated by the position setter, the gear shift operating device is set so that the gear shift ring reaches the target position by setting the target position of the gear shift ring by the position setter. Is automatically activated. Further, in the above configuration, in the case where the speed change operation device is operated by the speed setting device, the target speed of the vehicle is set by the speed setting device so that the vehicle is always maintained at the target speed regardless of the fluctuation of the load torque. The gear shift operation device is automatically activated.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an automatic transmission for a vehicle according to a first embodiment of the present invention.

FIG. 2 is a plan view of a main part of the cam device shown in FIG.

FIG. 3 is a side view of an essential part for explaining a displacement state of the movable spring receiver shown in FIG.

FIG. 4 is a vertical sectional view of an automatic transmission for a vehicle according to a second embodiment of the present invention.

5 is a side sectional view of a main part of the movable spring receiver shown in FIG.

6A and 6B are explanatory views showing the operating states of the respective members shown in FIG. 4 in comparison.

FIG. 7 is a vertical sectional view of an automatic transmission for a vehicle according to a third embodiment of the present invention.

FIG. 8 is a vertical sectional view of an automatic transmission for a vehicle according to a fourth embodiment of the present invention.

[Explanation of symbols]

 1 friction continuously variable transmission 4 output shaft 7 speed change ring 9 drive source 11 cam device 23 support shaft 25 fixed spring bearing 26 compression coil spring 28 movable spring bearing 34 detector 35 drive controller ΔS gap

Claims (4)

[Claims] 1. A transmission system from an input shaft to an output shaft is provided with a small-diameter transmission wheel, a large-diameter transmission wheel, and a speed-change ring on the same axis as those, and at the same time, a plurality of conical rotors are allowed to planetarily move. The gears are frictionally engaged and axially displaced along the conical surface of the conical trochanter toward the trochanter top side and trochanter bottom side to perform gear shifting and the output shaft rotational speed to 0 within the gear shifting range. A frictionless continuously variable transmission for driving a vehicle of a type including: a cam device that generates thrust for urging the transmission ring to the trochanter bottom side according to the load torque at the output shaft,
Of the support shaft provided so as to be interlockable with the speed change ring in the axial direction, the fixed spring bearing provided on the support shaft and the movable spring bearing provided so as to be displaceable in the axial direction, and the fixed spring bearing and the movable spring bearing. A spring that is installed along the support shaft and that generates a repulsive force that urges the speed change ring toward the trochanter top side against the thrust of the cam device, and a movable spring receiver, a spring and a fixed spring receiver during acceleration. A shift operating device that displaces the support shaft to the trochanter top side and sequentially displaces the support shaft to the trochanter bottom side during deceleration, using an electric motor as the drive source of the input shaft and At the reference position corresponding to the rotational speed of 0, a gap is provided in the transmission system from the movable spring receiver to the fixed spring receiver to cause a time delay in the speed change operation, and the movable spring receiver is displaced from the reference position to the ridge top side. When shifting A detector for outputting a second signal by detecting a movable spring bearing which is displaced to the reference position in the rotor bottom and outputting a first signal by detecting during lag,
An automatic transmission for a vehicle, comprising: a drive control device that starts a drive source based on a first signal from a detector and stops the drive source based on a second signal from the detector. 2. The gear shift operation device comprises a pilot motor, wherein the rack is provided as a movable spring bearing so as to be displaceable in the axial direction on the support shaft, and the pinion rotatably driven by the pilot motor is meshed with the rack, and the support shaft is also provided. The vehicle automatic transmission according to claim 1, wherein a fixed rack receiver is provided on the trochanter bottom side of the upper rack so as to be able to contact the rack. 3. A position detector that outputs a signal according to the position of the speed change ring, a position setter that outputs a signal according to the target position of the speed change ring, and a signal from the position detector and a signal from the position setter. The vehicle automatic transmission according to claim 1 or 2, further comprising: a comparator for comparing the above-mentioned physical quantities on the basis of the same physical quantity; and an operation control device for automatically operating the shift operation device based on a deviation in the comparator. 4. A speed detector that outputs a signal according to the speed of the vehicle, a speed setter that outputs a signal according to the target speed of the vehicle, and a signal of the speed detector and a signal of the speed setter are the same. The automatic transmission for a vehicle according to claim 1 or 2, further comprising: a comparator for comparing on the basis of a physical quantity; and an operation control device for automatically operating a shift operation device based on a deviation in the comparator.